| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] it [be] | 1358 |
|
| 2 | [was/were] [v-ing] it | 1256 |
|
| 3 | [was/were] [v-ing] [be] | 411 |
|
| 4 | [was/were] it [be] | 227 |
|
